Evaluator for log filtering in IdP 5.2.3

[Timo Tunturi]

Hi,

I made a simple pattern matcher Evaluator to ease the pain of log 
filtering in IdP 5.2.3 now that the JaninoEvaluator is deprecated and 
removed from logback.

The BasicEvaluator offers pattern matching based on the logger and 
message fields in the log entry. On top of pattern matching it does not 
provide any configurable logic like the JaninoEvaluator did. In my own 
use this is not a problem because combining pattern matching from 
BasicEvaluator and the logic from logback rules is plenty to do all the 
same things I used to do with the JaninoEvaluator.

It isn't polished and it isn't pretty but it works for me and I use it 
in production.

https://codeberg.org/ttunturi/logback-evaluators

-- Timo Tunturi / Aalto University IT